Sources:

Improving Criminal Regulations and Innovations in Clean Air Law Compared to the Law on Preventing Air Pollution/ Author: Abdolmajid Soodmandi/ Journal of Criminal Law Research, Volume 7, Summer 1398, Issue 27
Factors Affecting the Occurrence of Clean Air Days in Tehran/ Author: Fatemeh Dargahian/ Geography and Regional Development, Volume 15, Spring and Summer 1396, Issue 1 (No. 28)
Tasnim News Agency, News Code: 1299388, Date: 10/28/2016, Title: The Role of Government in Polluting Emissions
Salamat News, News Code: 38736, Title: What is the Role of Government in Air Pollution?
IRNA, News Code: 83612016, Title: Where is the Root of Air Pollution Problem?